Loans - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 5,905,884	$ 5,735,349
Nonaccrual	32,612	36,110
Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	1,004,128	925,434
Nonaccrual	4,412	7,690
PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	139,113	98,178
Nonaccrual	9,018	10,150
Current
Financing Receivable, Past Due [Line Items]
Loans	5,866,282	5,689,158
Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	998,375	915,799
Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	129,245	87,903
Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	4,233	6,382
Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	649	1,841
Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	767	125
Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	943	3,636
Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	692	104
Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	83	0
Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	1,814	63
Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	227,459	245,108
Nonaccrual	40	167
Construction and land development | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	37,067	26,250
Nonaccrual	0	0
Construction and land development | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	48	2,438
Nonaccrual	6	9
Construction and land development | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	37,067	26,250
Construction and land development | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	42	2,429
Construction and land development | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,201,336	1,141,310
Nonaccrual	4,516	8,181
Commercial real estate - owner-occupied | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	218,128	247,090
Nonaccrual	0	2,604
Commercial real estate - owner-occupied | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	32,089	39,451
Nonaccrual	3,350	3,106
Commercial real estate - owner-occupied | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	217,436	244,486
Commercial real estate - owner-occupied | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	28,739	36,345
Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	692	0
Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,673,587	1,395,854
Nonaccrual	5,191	8,084
Commercial real estate - non owner-occupied | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	428,095	323,273
Nonaccrual	925	1,009
Commercial real estate - non owner-occupied | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	79,272	29,122
Nonaccrual	2,504	4,922
Commercial real estate - non owner-occupied | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	427,170	322,264
Commercial real estate - non owner-occupied | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	76,768	24,200
Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,467,329	1,342,628
Nonaccrual	15,038	12,492
Residential real estate | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	181,344	176,105
Nonaccrual	2,540	2,889
Residential real estate | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	7,847	10,609
Nonaccrual	1,816	1,072
Residential real estate | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	178,504	171,507
Residential real estate | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	6,007	9,537
Residential real estate | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	300	1,605
Residential real estate | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	24	0
Residential real estate | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	104
Residential real estate | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	982,552	854,753
Nonaccrual	7,244	6,604
Commercial and financial | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	97,642	94,627
Nonaccrual	509	1,188
Commercial and financial | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	19,846	16,280
Nonaccrual	1,342	1,034
Commercial and financial | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	96,799	93,223
Commercial and financial | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	17,678	15,121
Commercial and financial | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	334	216
Commercial and financial | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	743	125
Commercial and financial | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	83	0
Commercial and financial | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Loans	163,019	188,735
Nonaccrual	583	582
Consumer | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	5,092	6,660
Nonaccrual	438	0
Consumer | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	11	278
Nonaccrual		7
Consumer | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	4,639	6,640
Consumer | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	11	271
Consumer | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	15	20
Consumer | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans		0
Consumer | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	190,602	566,961
Paycheck Protection Program | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	36,760	51,429
Nonaccrual	0	0
Paycheck Protection Program | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	36,760	51,429
Paycheck Protection Program | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	4,762,643	4,711,737
Nonaccrual	19,182	18,270
Portfolio Loans | Current
Financing Receivable, Past Due [Line Items]
Loans	4,738,662	4,685,456
Portfolio Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,817	4,416
Portfolio Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	168	3,532
Portfolio Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	1,814	63
Portfolio Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	190,344	216,420
Nonaccrual	34	158
Portfolio Loans | Construction and land development | Current
Financing Receivable, Past Due [Line Items]
Loans	190,310	216,262
Portfolio Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	951,119	854,769
Nonaccrual	1,166	2,471
Portfolio Loans | Commercial real estate - owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	949,282	851,222
Portfolio Loans | Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	671	1,076
Portfolio Loans | Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,166,220	1,043,459
Nonaccrual	1,762	2,153
Portfolio Loans | Commercial real estate - non owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	1,164,458	1,041,306
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,278,138	1,155,914
Nonaccrual	10,682	8,531
Portfolio Loans | Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	1,267,081	1,142,893
Portfolio Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	340	3,002
Portfolio Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	35	1,427
Portfolio Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	61
Portfolio Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	865,064	743,846
Nonaccrual	5,393	4,382
Portfolio Loans | Commercial and financial | Current
Financing Receivable, Past Due [Line Items]
Loans	856,579	737,362
Portfolio Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,179	135
Portfolio Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	99	1,967
Portfolio Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	1,814	0
Portfolio Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	157,916	181,797
Nonaccrual	145	575
Portfolio Loans | Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	157,468	180,879
Portfolio Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	269	203
Portfolio Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	34	138
Portfolio Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	2
Portfolio Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	153,842	515,532
Nonaccrual	0	0
Portfolio Loans | Paycheck Protection Program | Current
Financing Receivable, Past Due [Line Items]
Loans	153,484	515,532
Portfolio Loans | Paycheck Protection Program | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	358	0
Portfolio Loans | Paycheck Protection Program | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Paycheck Protection Program | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	$ 0	$ 0